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Komodo IDE, although not Open Source, is extensible using standard Mozilla APIs based on XUL, XBL, and XPCOM, plus Python and JavaScript.
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ĪctiveState added browser-side support in Komodo IDE 4.0, including debugging, DOM viewer, catalog support, HTTP Inspector, and code intelligence for languages such as JavaScript, CSS, HTML, and XML, enabling programmers to edit and debug Ajax code and multi-language files. In December 2022 KomodoIDE was retired by ActiveState and open sourced on Github as OpenKomodoIDE. It supports dynamic languages, including Tcl, Perl, PHP, Python, and Ruby framework stacks like Ruby on Rails and CakePHP and client libraries such as the Yahoo! UI Library and Dojo. ActiveState's Komodo IDE is built on the Mozilla platform.
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